Collapsible stand



R. n. H. ANDERSON.

COLLAPSIBLE STAND. APPLICATION FILED JAN. 25. 1921. RENEWED nEc.21,1s21.

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. fioeriffl 1777 176582150)? Eli ROBERT D. H. ANDERSON, OF NEW YORK, N. Y.

COLLAPSIBLE STAND.

Specification 0 fLett s Patented Aug. 1, 1922.

Application filed January 25, 1921, Serial No. 439,732. Renewed December 511, 1921. Serial No. 524,012.

To all tU/LOHZ- it may concern Be it known that I, ROBERT D. H. Annun- SON, a citizen of the United States, residing at New York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Collapsible Stands, of which. the following is a specification.

This invention has relation to electric light brackets and supports, and has for an Ol)](-3Cll to provide a stand having pivoted legs mounted upon a standard with means for locking the legs in an extended position to hold the standard erect, the legs being foldable against the standard when desired to render the device more compact,

In. addition to the foregoing, this invention comprehends improvements in. the details of construction and arrangement of the correlated parts within the spirit of the invention and the scope of the appended claims.

In the accompanying drawings forming a part of this application in which similar and corresponding parts are deslgnated by the same characters-of reference throughout the several views in which they appear:

Figure 1 is a view in perspective of my 1mproved standard and support, showing the manner of its use.

Figure 2 is a view of the standard and le s folded.

Figure 3 is a fragmentary bottom plan view showing the legs extended.

Figure f is a transverse section taken on the line t-4t of Figure 3, and

Figure 5 is a detail view of one of the locking members.

lVith reference to the drawings, 10 indi cates a tubular standard having a reducing nipple 11 at its upper end in which a sliding rod 12 is held, a set screw 13 being tapped in the nipple to engage the rod and hold the same against movement. An articulated lamp supporting means 14- may be mounted upon the upper end of the rod for the detailed disclosure of which reference is had to other patents as the present improvement concerns itself solely with the under structure. At the lower ends of the tubular standard there is provided a socket member or sleeve 15 formed with three or more diverging arms 16 integrally formed therewith, said arms be ing hollow or cut-away upon their under sides and their outer extremities bifurcated as shown. A corresponding number of legs 17 are provided, preferably formed of tubing and each havmg an inner end located within the under side of one of the arms 16. Rivets, bolts or the like 18 passing through the bifurcated portions of the arms and the legs serve to pivot the latter for movement. Also mounted in the under side of each arm is a locking member or dog shownin detail in Figure 0 andconsisting of a slightly curved casting 19 having a transverse opening 20 which passes through bosses 21 on each side of the cast ing to reinforce the material around the opening. One end terminates in an enlargement 22 to facilitate manipulation and the other in a suljistantially triangular enlargement 23 having the apex thereof connected integrally to the bosses 21 and the side of the enlargement remote from the said point of connection slightly curved. Attention is called to the corner 2st of the triangular en largement which is located at the inner curve of the casting, the purpose of which will be presently explained. A notch 25 is formed upon the inner curved side of each casting and an endless elastic element, such as an endless coiled spring 26 is embraced about all of the locking dogs and seated in the notches, thus urging the enlargements 23 thereof outward and away from each other.

In the folded position of the device as shown in Figure 2 the legs are folded back against the sides of the standard. To extend the legs it is but necessary to grasp the up per end of the standard leaving the legs free. The latter will fall by gravity, the inner ends thereof moving upward into position within the cut-away portions of the arms 16. Upon engagement of the inner ends of the legs with the triangular portions of the locking dogs the outer or lower ends thereof will move outward against the tension. of the elastic element 26 until the inner ends of the legs are entirely received within the arms 16 whereupon the corners 24.- of the locking dogs will enter the open ends of said legs as shown in Figure 4. The legs will then be securely held against movement in either direction. Thus the act of extending the legs is automatic. To fold the legs a reversal of the op eration is necessary, the lower ends of the locking dogs being first manually brought together which will disengage the upper ends thereof from the legs permitting the latter to be folded up again. It is preferable that the shape of the inner ends of the legs be elliptical with the minor axis parallel to the rivets 18. This is accomplished by distorting the material which is usually circular in cross section. V

Having thus described my invention what Iclaim as new and desire to secure by United States Letters Patent is 1. A device of the character described comprising a standard, legs pivoted thereto at points spaced from the inner ends of the legs, said inner ends being socketed, and spring held dogs mounted on the standard andadapted to enter the sockets to hold the legs against movement.

2. A device of the character described comprisinga standard, legs pivoted thereto for positioning in diverging relation to support the standard, the inner ends of said legs being socketed, and a plurality of dogs pivoted to the standard having means automatically seatable in the sockets to hold the legs against movement, and having manipulatable terminals, and an elastic means embracing the terminals to hold the dogs in looking position. I

8. A device of the character described comprising a standard, a plurality of arms extending from the standard in diverging relationand having their under sides recessed, a plurality of tubular legs one pivoted within each arm, a plurality of dogs pivoted one to each arm and having means.

automatically seatable in the inner ends of the legs, and having .manipulatable terminals, and anelastic endless means embracing the terminals to hold the dogs in locked position. 4

4. A device of the character described comprising a standard, aplurality of legs plurality of'dogs pivoted on the standard,

one for each leg, and angular curved enlargment on each dog engagable by the leg when the latter is moved to extended position, whereby one corner of said enlargment may slip into the socket to hold'the leg against movement, and resilient means engaging the dogs to hold themin a locked position.

In testimony whereof I ,afiix my signature.

ROBERT D. H, ANDERSGN. ['L. a] 

